基于二重威布尔混合分布的某型燃机燃油泵组件可靠性分析

Reliability analysis of fuel pump component for a gas turbine based on a double Weibull hybrid distribution

燃油泵组件是机电一体化的产品,其在使用中获得的故障数据存在不同失效机理的情况,因此一重威布尔分布无法准确描述产品失效机理,而混合分布通过将多种失效分布进行耦合,能够充分描述产品失效机理。本文将二重三参数威布尔混合分布模型应用在舰船发动机附件故障分析中,基于某型燃机燃油泵组件的故障数据,通过数据分析直方图确定故障模型与模型初始化参数,通过Matlab非线性曲线拟合方法来估计二重三参数威布尔混合分布的参数。研究方法及成果能够为燃油泵组件可靠性分析及优化改进提供一定的借鉴。

The fuel pump component is mechatronics.The fault data obtained in the use of the products contains different failure mechanisms,so a single distribution cannot describe the product failure mechanism accurately,while the hybrid distribution can couple multiple failure distributions,thus can fully describe the product failure mechanism.For the first time,the double-three-parameter Weibull hybrid distribution model is applied to the fault analysis of ship engine accessories.Based on the fault data of a fuel pump component of one certain type of gas turbine,the fault model and model initialization parameters are determined by data analysis histogram.The linear curve fitting method is used to estimate the parameters of the double-three-parameter Weibull hybrid distribution.The research methods and results can provide a feasible method for the reliability analysis and optimization of fuel pump components.